Journal
ULTRASONICS SONOCHEMISTRY
Volume 43, Issue -, Pages 15-22Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultsonch.2017.12.039
Keywords
Ultrasonic wave; Sonication Carbon nanotubes (CNTs); Ultra high molecule weight polyethylene (UHMWPE); Extensional deformation; Melt mixing
Categories
Funding
- National Key Research and Development Program of China [2016YFB0302302]
- Natural Science Foundation of Guangdong Province, China [2017A030313270]
- Science and Technology Planning Project of Guangdong Province, China [2017B090901038]
- Special Support Program of Guangdong Province [2015TX01X151]
- State Key Laboratory of Materials Processing and Die & Mold Technology, Huazhong University of Science and Technology [P2018-005]
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In this work, design and development of anew melt mixing, method and corresponding mixer for polymer materials were reported. Effects of ultrasonic power and sonication time on the carbon nanotubes (CNTs) filled ultra high molecular weight polyethylene (UHMWPE) nanocomposites were experimentally studied. Transmission Electron Microscopy images showed that homogeneous dispersion of CNTs in intractable UHMWPE matrix is successfully realized due to the synergetic effect of ultrasonic wave and extensional deformation without any aid of other additives or solvents. Differential scanning calorimetry results revealed an increase in crystallinity and crystallization rate due to the finer dispersion of the CNTs in the matrix which act as nucleating point. Composites' complex viscosity and storage modulus decreased sharply at first and then leveled off with the increase of sonication time or the ultrasonic power. The thermal stability and the tensile strength of the CNTs/UHMWPE nanocomposites improved by using this novel mixing method. This is the first method that combined the ultrasonic wave and the extensional deformation in which the elongation rate, sonication time and ultrasonic power can be adjusted simultaneously during mixing. The novel mixer offers several advantages such as environment-friendly, high mixing efficiency, self-cleaning and wide adaptability to materials.
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